It's easier, yes. But also it's harder to effectively work in a badly designed office (read open office). At home, I can create my ideal work environment. Specifically for me, I don't want to sit in traffic for an hour a day just to work in a worse environment. It's also my time. Work is not paying for my commute so my 40 hour week turns into a 45 hour week. This dilutes my pay while at the same time reducing my free time to spend with/for my family. With young kids, you can't get that time back.